The beam shown in Fig. 7-10a is made of wood and is subjected to a resultant internal vertical shear force of V = 3 kip. (a) Determine the shear stress in the beam at point P, and (b) compute the maximum shear stress in the beam. 5 in. 2 in. V=3 kip in. 1.5 in. N. 2 in. 0.5 in. N 2.5 in. (a) ZA Tp = 0.216 ksi